Productivity

As already explained, pops are the only generator of Money, Research and Manpower! And there is a great many modifiers. For the human player to keep a better overview, there is the productivity-modifier, similar to Discipline for armies. It affects whatever the pop produces and is itself affected by various parameters throughout the game. Some of the modifiers to productivity are:

人口文化和宗教

As each state has its own State Culture and Religion, so does each pop unit have its own as well. When a pop's religion and/or culture differs from the state in which it resides that pop's happiness is affected. Each individual pop's culture and religion can be separately converted to match the state's own for a price.

Assimilation of 1 pop costs 20 Oratory Power Points

Conversion of 1 pop costs 20 Religious Power Points

獲得人口

Population of each social class can change through several means: Growth/Death and Conquest.

Growth/Death

The base rate of population growth in each city in the game is 0.2/day (or month?). When this number reaches 100% a new pop of that type is born in that city. There are many modifiers to this value. The population growth in a city is altered by factors such as terrain type, Civilization value, amount of pops currently living in the city (-1% per pop) and availability of trade goods.

When a new pop is born, its social class is determined by chance. (25% each)

Population growth in a city can also become negative (by modifiers). If this happens the growing pop will shrink instead. If there is no growing pop an existing pop will be chosen (at random) and a progress bar toward 0 will start. If it reaches 0% that pop will die.

Conquest

Population is also gained through warfare. As cities are sacked, POWs are taken to the state capital or to the provincial capitals as slaves. It should be noted, that pops within the newly conquered city may be demoted:

Pop Movement

A pop can be moved from a city to any city in the same province, an adjacent city or a city across an adjacent sea-zone for a power cost of 20 Civic Power.

Slaves are cheaper than other pops to move, and only cost 5 Civic Power to transfer. Since the number of slaves in a city influences the production of Trade Good, this means that you can more easily set up production centers for certain goods.